Appliance for supplying air to furnaces.



No. 664,695. Patented nec. 25, leon. J. vlcAns, sn. L .1. vlc/Ans, 1n. APPLIANCE FOR SUPPLYING AIR T0 FUBNACES.

(Application Blad Har. 14. 1900.) '(No Modal.) 2 Shets--Sheet l.

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Patented Dec.. 25, |900. J. VICARS, SB. & J. VICARS, 1n. APPLIANCE FUR SUPPLYING AIR T0 FURNAGES.

(Applicntion led In. 14, 1900.) (lo Model.) 2 Sheets-Sheet 2.

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UNITED STATES PATENT EEICE.

JOHN vIoARs, stu-AND JOHN violins, JR., or LIVERPOOL, ENGLAND.

APPLlANCE FOR SUPPLYING AIR TO FURNACES.

SPECIFICATION forming part of Letters Patent No, 664,695, dated December 25, 19:00;

Application filed March 14, 1900. Serial .NO- 8,603. (No model.)

T0 LZZ whom, it Wray; conce-rn,.- l

Be it known that we, JOHN VIOARS, Sr., and JOHN VICARS, Jr., subjects of the Queen of Great Britain, residing at Liverpool, in the county of Lancaster, England, have invented new and useful Improvements in Appliances for Supplying Air to Furnaces, of which the following is a specification.

The invention relates chieiiy to mechanical stokers known as cOking-stokers,in which the fuel is fed by mechanical means from a hopper in a heap on the dead-plate of the furnace and is gradually carried on by reciprocating fire-bars. In some cases at present parts of the heap of fuel do not burn owing to insufficient draft, but remain dead, and consequently by the reciprocation of the firebars su ch unburned fuel is riddled through between the bars into the ash-pit, and thus waste is caused.

The object of our invention is, mainly, to provide steam -jet appliances whereby currents of air sufficient to maintain combustion or coking shall be directed into the parts of the heap of fuel which are usually dead, thus insuring the ignition and coking or adhesion of the fuel into masses and preventing it falling between the fire-bars. The appliances are movable to allow of ready inspection of the fire or other objects behind and without disturbing the steam connections. We attain this object or purpose by appliances such as are illustrated in the accompanying drawings, in which- Figurel is a longitudinal sectional view, on the line A A on Fig. 2, of the appliances and so much of a mechanical stoker of the wellknown Vicars type as is necessary to show the application of the invention. Fig. 2 is a horizontal section on the line B B on Fig. 1. Fig. 3 is a front view. Figs. 4C, 5, and 6 are similar views to Figs. 1, 2, and 3, respectively, but with a different arrangement of movement of the air-cones.

Referring to Figs. l, 2, and 3, we use a hollow cone 2, formed with or attached to a piece 8 and free to be turned laterally on a pivot 4, secured to the dead-plate 5 or other convenient part of the framework of the Stoker. We prefer to use in front of the cone 2 another cone 6 or several cones, if found desirable, one in front of the other, all the cones being att-ached together. In front of the cones we arrange a nozzle 7, through which' a jet of steam can be directed into the cones; so as to induce through them a current of air and force it through the openings or passages 8 into the heap of fuel on the deadplate at 9. The passages 8 are formed underneath the fuel-feeding opening 10, of which there are 6o two, one on each side ofthe furnace, only one being shown. 11 is the usual fire-door at the center of the furnace. 12 are the fire-bars, which may be reciprocated in any usual way. 13 is the casing of one of the fuel-feeders, 65 14 is the side. of the furnace-flue, and 15 is the front plate of the boiler. The nozzle 7 is secured to a hollow spindle 16, passing through a steam-chest 17, fixed to some part of the framework of the stoker-say to the 7o fuel-feeder casing 13, as shownby a bracket 18. The spindle 16 is provided with a screwthread on its exterior, so that by means of nuts 19 it can be adjusted longitudinally nearer to or farther from the cones 2 6, as 75 may be found necessary, to get the best effect. 20 are packing-rings, of asbestos or other suitable material, to prevent escape of steam between the nuts 19 and chest 17. 2l

is an opening in the spindle to admit steam 8o from the chest, andv22 is a pipe for supplying steam to the chest. By the above arrangements the cones 2 6 may be readily moved aside, as shown by the dotted lines 2a on Fig. 2, to allow of access to or inspection of the fire through the passages 8 and without disturbing or moving the steam connections to the chest 17, thus obviating the wear and liability to leakage which would exist if the steam connections had to be moved every 9o time it was desired to inspect the fire.

Although the above description refers only to using the appliances under the fuel-feeders, it will be obvious that they may be applied in various positions where similar conditions of fuel exist or where it is desirable to quickly remove the cones to allow of access to or examining objects behind them.

Referring to Figs. 4, 5, and 6 in these views, the parts are the same asin Figs. 1, 2, Ioo and 3, with the exception that the cones 2 6 are formed with or attached to a piece 3a, free to slide in a groove or guide 23 in or on the dead-plate 5, so that such cones can be moved laterally, as shown by the dotted lines 2b on Fig. 5, to allow of access to the passages 8. Like letters on these views denote. similar parts as in Figs. l, 2, and 3.

We do not confine ou rselves to the particular arrangements above described, as other arrangements for moving the cones aside might be devised; but,

What we do claim as our invention, and desire to secure by Letters Patent, is-

1. The combination with an opening leading into a furnace of a laterally-movable airinducing cone, and a steam nozzle supported independently of the cone substantially as described.

2. The combination with an opening leading into a furnace of laterally-movable air-inducing cones, and a steam-nozzle on ahollow spindle adjustable longitudinally through a `steam-chest supported independently of the i In testimon y whereof I, the above-named JOHN VICARS, the younger, have signed my name to this specification in the presence of two subscribing Witnesses.

JOHN vIoARs, THE YOUNGER'.

Witnesses to the signature of John Vicars,

the younger:

W. B. JOHNSON, H. DUGGAN. 

